*Values depending on grid structure

12Future Grid Operation The future LV and MV grid includes an information network  The electricity price will change in 15‐minute intervals  Smart grids permit the individual operation of appliances (Washing machines, dishwashers, freezers, air condition, electrically heated hot water .  Smart grids have to be operated and controlled. Unit commitment (operation power stations) becomes more sophisticated  Renewable generation units will be switched off some times, as there is surplus energy  Operation of the storage technology is an important task The future grid has more HV, MV and LV lines  Fluctuating generation and consumption Æfluctuating load flows  Monitoring (temperature) of lines

13

Summary There are many impacts of RE on the grid  Fluctuating generation of energy  Rise of voltage in LV and MV grid  Behavior in the case of a fault  Stability of the grid  Location of generation changes  Energy is fed back into the MV and HV grid